Synthesis and characterization of silver-titanium dioxide nanomaterials via horizontal vapor phase growth (HVPG) technique for antibacterial applications

Date of Publication


Document Type

Master's Thesis

Degree Name

Master of Science in Mechanical Engineering


Gokongwei College of Engineering


Mechanical Engineering

Thesis Adviser

Alvin Y. Chua
Gil Nonato Santos

Defense Panel Chair

Maglaya Archie

Defense Panel Member

Martin E. Kalaw
Neil Stephen Angosta Lopez


Synthesis of different nanomaterials can be produced using several methods. This study provides the synthesis of Silver-titanium dioxide nanocomposite materials using Horizontal Vapor Phase Growth (HVPG) technique.

The two parameters to be considered in the study for the synthesis of Silver-titanium dioxide uses HVPG technique are temperature growth and baking time. The temperature will have varied using values of 800°C, 1000°C, and 1200°C where the baking time growth from 4 hours, 6 hours, and 8 hours. The quartz tubes with Silver-titanium dioxide nanomaterial were characterized using a Scanning Electron Microscope (SEM) and an Energy Dispersive X-ray (EDX) for surface morphology, elemental and atomic composition. The SEM images shows that nanomaterials were successfully grow using HVPG technique and were able to produce nanostructures (e.g. nanoparticles, nanospheres, nanorods, and nanotriangulars).

The temperature growth, baking time, and diameter of the nanomaterial was analyzed using JMP Analysis of Variance (ANOVA) software based from SEM images measurement from each zone. The study successfully determined the equation of the diameter of the nanomaterial in relation to temperature growth and baking time. Moreover, JMP ANOVA Software was able to produce a graph profiler based on designed temperature growth and baking time.

The results reveal that the best result of temperature growth and baking time was analyzed to be 1000°C with 8 hours due to a majority of nanostructures is in nanorods. Atomic Force Microscopy (AFM) determines the mechanical properties of Silver-titanium nanocomposite materials which are include the Surface roughness, Hardness, and Reduce Youngs Modulus.

The pour plate technique was used for bacterial test and successfully determined the efficiency of the materials to eradicate the bacteria with the Silver-titanium dioxide nanocomposite material that contains 50% Ag and 50% Titanium dioxide. The bacterial test used was Staphylococcus aureus.

Abstract Format






Accession Number


Shelf Location

Archives, The Learning Commons, 12F Henry Sy Sr. Hall

Physical Description

computer optical disc.

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